Our chickens free range all day. Tonight when we went to close up the coop and count and visit everyone we found one of our hens injured. Her eye, cheek and area between eye and ear are swollen(like a half of a golf ball in under her skin) and her beek is crocked. The lower beek is pulled towards the injured side. Small cut/wound between eye, comb and ear area. I have no idea how long it has been that way (all day, 1/2 day, etc) I can see the inside of her lower mouth and it seems dusty? but can see moisture back on tongue area. Her craw doesn't feel full, but also doesn't feel empty. What should I do? I have a "hospital" coop I can put her in. I don't know if she is suffering badly, should I put her down or see how she is in the morning? I know I should probably seperate her from other chickens so they don't pick on her. Any help appreciated.